Mixed Numerical-experimental Techniques: Past, Present and Future

Cardon, Albert; Sol, Hugo; Wilde, W. P. De; Visscher, Joëlle De; Hoes, Kris; Dinescu, Daniela

doi:10.1007/0-306-48410-2_52

Cited by 2 publications

(3 citation statements)

References 15 publications

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“…• The average sensitivities of the in-plane stiffness properties for the contact analyses are larger than for the eigenfrequency analyses, especially for propeller 90. In contrast to what is stated in [5] that advocates the use of static data in the MNET.…”

Section: Sensitivity Studymentioning

confidence: 69%

“…This special application of inverse methods is known as a mixed numerical-experimental technique (MNET). Since the nineties many papers have been published on the application of MNET's for mechanical problems, but can be used for any other field if an accurate and sensitive experimental method is available and a good theoretical model exist [5]. Many different approaches are presented in literature for model updating by using MNET's, see for instance the references made in [6], [7], [8] and [9].…”

Section: Introductionmentioning

confidence: 99%

“…Dynamic experiments seems to be preferred in literature. This could be attributed to the fact that with dynamic experiments eigenfrequencies can be efficiently obtained which are much more sensitive parameters than output parameters obtained from static experiments, according to [5]. However, with dynamic testing one is restricted to a global structural response, while static tests can be used to determine parameters that influences both global and local structural behaviour [17].…”

Section: Introductionmentioning

confidence: 99%

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Finite element modelling and model updating of small scale composite propellers

Maljaars

Kaminski

Besten

2017

Composite Structures

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The application of composite materials in marine propellers is a relatively recent innovation. Methods have been presented to analyse the hydro-elastic behaviour of these type of propellers and in some studies these methods have been validated as well. Differences between measured and predicted responses are typically explained from inaccuracies in structural or fluid modelling. It is beyond all doubt that for an accurate finite element (FE) model a correct modelling of the fibre orientations and material properties is required. Both subjects are addressed in this work. An approach is presented in order to accurately define the element dependent fibre orientations in doubly curved geometries like (marine) propeller blades. In order to improve the structural response prediction this paper presents an inverse method based on experimental and numerical results which can be used for structural identification and FE model updating. In the developed approach the residual between measurement results obtained with static experiments and results obtained with an FE model is minimized by adapting the stiffness properties in the FE calculation. This method has been successfully applied to two small scale composite propellers. The obtained material properties have been determined with a relatively high confidence level. A verification by means of measured and calculated eigenfrequencies show also that accurate results are obtained with the inverse method. Therefore, this paper gives a positive answer on the research question whether it is possible to determine the stiffness properties of small scale composite marine propeller blades from a static experimental data.

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Section: Sensitivity Studymentioning

confidence: 69%